Elastic-fluid turbine



III IUNGGREN.

mane FLUID TURBINE.

APPLICATION FILED MAY 9,19I9.

Patented Dec. 80, I919 ll HAM 42 2 Inventor: sc r-Jun gren,

His Attorney.

" UNITED STATES O I OSCAR JUI NGG REN, F SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC i COMPANY, ACOB'PO BATION OF NEW YORK.

nLAs'rIc-rLnrn'TUnBmE.

To all whom it may concern:

.Be it known that I, OSCAR Juno-oxen, a

citizen of the United States, residing at Schenectady, .in the county of Schenectady,

State of New York, have invented certainfl new and useful Improvements in Elasticthe type comprising a plurality of disksor order to reduce the Weight .distance. 0n the other hand,

i with this arrangement inated and as a consequence the wheels or greatest 'the bearings may ature changes which are continuously on in the turbine due, to chan wheel or shaft, these latter stressesdue to temper otherwise the wheel i tionis to provi which the wheel isflexibly or wheels mounted} on a shaft and carrying suitable buckets'upon the periphery. With such turbines it is important that the disks or wheels'be made as light as possible in of the-machine thereby reducing its size. In addition, by making the disks or wheels as thin as possible particularly at the hubs where the stresses occur, the distance between he reduced, or a larger number of stages may be put in in the same it is essential to obtain a rigid construction which; will withstand not only -the stresses set up; due to the centrifugal action,O

but also those which occur due to the su stantial temperes in lo and variations in the vacuum. I f the turbine disk is rigidly fastened to the ature changes are very large, particularly in the hubs, on account of the wheels or disks responding. much'more quickly .to temperature changes than the heavyshaft, and

a relatively heavy hub-is required as made too thin and light will distort and possibly loosen on the shaft. r

- The primary object of the present invende an improved structure in yieldingly connected to the shaft it is free to respond wheel having a. strong to temperature changes independently of the shaft. By this arrangement the strains due to temperature changes are practically elimdisks may be made much lighter and thinner than heretofore.-

A further object of my invention is to,

i i provide in connection with the flexible wheel mounting an improved arrangement of phragm packing where n certain of the eleoing d s I Specification lit-Letters Patent.

Patented Dec. 30, 1919.

Application filed my 9,1919. Serial No. 85,856.

ments utilized inthe flexible connection are also used in connection with the packing.

For a.v consideration of what I believe to line'11 of Fig. 2; 2 is a cross-section taken on line 22, 1; and Figs.-3', 4, 5

and'6 are views showlng modifications.

. Referring to the drawing, 8. indicates the casing of an elastic fluidturbine and 9 the shaft. -The casingis divided into a suitable number of stages by nozzle carrying diaphra'gms 10, the casing and diaphragms'bein split horizontall "to facihtate assembling. Carried s aft 9 and. located between the diaphragmsare wheels 11 on the peripheries of whichfare'mounted buckets 12.

Now, according to my invention, I fasten each wheel lljto shaft 9 by means of a cylindrical member 13 which is somewhat larger in diameter than the shaft and which is connected at one end-to the wheel and iat-theother end to the shaft. The cylindricalmember 13 may be connected to the shaft and to the wheel in various ways and the draw ng Lhave illustrated; several arrangements which will now be described.

In Figs. 1 and 2, cylindrical member 13 Y is provided with a flange 14: whichis fas,

tened to the wheel by able means. The side of'the wheelie provided with anannular recess into: which rivets 15 or other suit-j flange l4 fits so the surfaces oftlle fla e and-wheel are flush, and the flange is ma e thicker than the cylindrical member and has 1" i an annular ove 16 into which ani'annulan rojection 1 at'the bore of the wheelfits; r, viewed an' internal edge which fits into a groove in the sideof the wheel.- This provides interlocking shoulfrom another aspect, flange 14= may be considered as having 'ders between the 'wheeland the cylmdrical member for taking-a part of the stresses due to centrifugal force, andv these shoulders are forced into firm engagement with each other and held by calking wires or strips asindi'ca'ted at 18.

The end of member 13.

, which is fastened to the shaft is provided with an internal projection 19 which serves to thicken the member at such end and give it an internal diameter substantially. equal to the shaft diameter; also oyer the end of member 13. This serves-'- a shoulder for, engagement with a collar v.'

20. carried by the shaft. Collar may 'be a spring ring fastened ina groove in the ting it 1' into .place. 1

is first fastened at theoneend'to' the wheel" after which the otherlend is on to the shaft in firm engagement with" collar 20. One orjmore 'pins- 21 are thenput into; lace to hold "the member against movement: .ontthe shaft after which a ring 22 isshrunk ment itv will be noted that member 13 ex- I: tends" through the bore of the wheel, the flange 14 being located on the side of the 20 whicli i ifaistgned tolthe Shaft.

wheel remote from the: endof member 13 This arrangement'permitsof a cylindrical member of the desired length being used Within a minimum axial length of shaft and'hence f 25 results in a short overall length for anygiven number of stages, 5 p

In the modifications. shown in. F gs. 3, a

" and 5, the cylindrical member 13 is fastened to the shaft in the same manner as'is shown in Figs. 1 and 2, but the manner in WhlCh' it isv-fastened to the wheel varies in each. instance.- In Fig. 3, member 13 is provided with athickeneddflangefil which fits into, a recess in the sideof the wheel and is fastened to. the wheel by. rivets 25. Alsothe uppered eof the groove is pressed-or I peened over as indicated at 26 which serves 'to.fit the flange firmlv' into the groove and hold it: there.- This results in a slightly longer structure than that of F igs. l and but is a simpler one to build;

In Fig. 4: cylindrical member l3-is pro- Q fvided with a narrow flange formin a shoulder 28 and the wheel is shrunk onto the cylindrical member and in engagement with the.

shoulder. The wheel may have an annular groove as shown into which shoulder 28 f ts. After the wheel has been shrunk onto cyl1ndricalmember 13, the two are'fastened together by a suitable number of taps as indicated at 29.

In Fig. 5, the end of cylindrical member 13 is located in an annular groove 30 in the side of the wheel and held by pins 31 or other suitable means. After the end. of member 13 has been inserted into groove 30, wall 32 at the one side of the groove may he rolled or otherwise forced toward the end of member 13 to grip it tightly in the groove. This arrangement is very simple to make and results in'a strong connection between the wheel and the her 13.

In Fig. 6 is shown an arrangement forfastening the cylindrical member to the h ring'37, such rin In assembling, the cylindrical member 13' cal member and the whee phragmand the shaft to sleeves 38 on which cylindrical member I desire to have it understood that the. a r'atus shown is only illustrative and that invention may be carried out by other means.

end of memdricalmember '13 is provided with a flange 34 having an inturned edge 35 which is 10- I 4 floated injanannula'r groove 36 in the side of shaft, the ringbeing split to facilitate putthe wheel 11 andlis held therein by a 'calking which enga e simi ar surfaces at the radially outerside o groove 3.6. and on edge 35. This arrangement gives astrongconnection between the cylindrical member and the .wheel without theuse of rivets, taps or the like. ;At the same time ithas to length' of structure as pointed out in con- ,nection with Figs. t6 firmly connect the cylindrical member! 13 to the'wheel and shaft. In this arrangethe advantage as v 1 and 2. In other Words, in Figs. 1 and 2 and in Fig.6, thecylindrimay be viewed having knurled surfaces v e as being arranged in concentric relation to eachothen- As is well understood-theremust be a suitable packing means between the diaand in Figs. '1, 4 and 5'1 teeth 39 which pack preventfleakagef haveshownshrink rings 22 as being provided withprojecting are annularv packing againstthe inner Sm:

face of a cylinder 40. I Cylinder 40- is 0011-" 1 nected to the diaphragm 10 by an expansion ring 41. one end of which 15 formed integral with cylinder 40 and the other end of i H which is fastened in a, groove in the diaphragm. A pin 42 isprovided toprevent c rcumferential movement of cylinder 40 and expansion ring 41. The use ofxan expansion ring .to connect cylinder 40 to the diaphragm is of advantage .in that, it per- 'Lmitsthe cylinder-to expand and contract to the diaphragm. Cylinder 40 4 p and expansion rmg 41: are splithorizontally relatively the same as is the diaphragmto facilitate vassembling. a a a In F g. 3 the packing teeth 43'instead of being arranged on aslee've formed integral with'shrink ring 22, are formed directly on 13 and pack a ainst a surface on a member 4:4: having a Iiead 45 carried in a. groove 46 in the diaphragm.

47 is a locking piece held by a screw 48, its function be ng to prevent member from turning. t

In accordance with the provisions of the patentstatutes I have described the principle of'operation of my invention, together i with the apparatus which I now consider to represent the best embodiment thereof; but

PP the claim as new and desire to se- Letters Patent of the United and has one end connected to the shaft and the other to the wheel 011 the side of the wheel remote from that end of the member which is connected to the shaft.

2. The combination with a shaft and a wheel having a bore of greater diameter than the shaft, of a cylindrical member which passes through the bore of the Wheel,

a flange at one end of the member which is connected to the wheel, and means connecting the other end of the member to the shaft on the side of the wheel remote from that end of the member which is connected to the shaft.

, 3. The combination with a shaft, and a wheel having a bore of greater diameter than the shaft, of a cylindrical memberof greater diameter than the shaft, an internal projection at one end of the member which engages the shaft, a shrinkring for fastening such end to the shaft, and means for fastening the other end of said member to the wheel.

at. The combination with a shaft, and a wheel having a bore of greater diameter than the shaft, of a cylindrical member of greater diameter than the shaft, an internal projection at one end of the member which engages the shaft, a shrink ring for fastening such end to the shaft, a flange at the other end of said member, and means fastening the flange to the wheel.

7). The combination with a shaft and a wheel having a bore of greater diameter than the shaft, of a cylindrical member of greater diameter than the shaft, a flange at one end of said member, said flange having an inturned edge, a groove in the wheel into which said edge fits, a calkingmeans for holding it therein, and means for fastening the other end of the member to the shaft.

6. In combination, a shaft, a wheel having a bore of greater diameter than the shaft, and a cylindrical member surrounding the shaft and having one end connected thereto, the other end extending through the bore of the wheel and being fastened thereto on the side remote from that end of the member which is connected to the shaft.

7. In combination, a shaft, a wheel having a bore of greater diameter than the shaft, a cylindrical member surrounding the shaft and having one end connected to the shaft and the other end connected to the wheel, a diaphragm adjacent the Wheel and packing means carried by the diaphragm and cylindrical member.

8. In combination, a shaft, a wheel hav- 'ing a bore of greater diameter than the shaft, a cylindrical member surrounding the shaft and having one end connected to the shaft and the other end connected to the wheel, a diaphragm adjacent the wheel, a packing surface carried by the diaphragm, and packing teeth carried by said cylindrical member and packing against said surface.

9. In con'ibination, a shaft, a wheel having a bore of greater diameter than the shaft, a cylindrical member surrounding the shaft, means including a shrink ring for connecting one end of said member to the shaft, means connecting the other' end of ,said member to the wheel, a diaphragnr adjacent the wheel, a packing surface carried by the diaphragm, and a sleeve carried by the shrink ring and having annular packing teeth thereon which pack against said surface.

In witness whereof, I have hereunto set my hand this 8th day of May, 1919.

OSCAR JUNGGREN. 

